# CVE-2022-40674: expat: libexpat before 2.4.9 has a use-after-free in the doContent function inxmlparse.c.

CVE-2022-40674 is fixed in 13 products on 1 platform, first by expat 2.2.9-1ubuntu0.5, released September 14, 2022. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2022-40674
- Priority: High
- CVSS: 8.1 (Medium)
- EPSS: 0.0225
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 14, 2022

## Description

libexpat before 2.4.9 has a use-after-free in the doContent function inxmlparse.c.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | expat Debian 11.6 (bullseye) | 2.2.10-2+deb11u4 | [DSA-5236-1](https://patchblox.com/security/data/fix/linux/dsa-5236-1.md) | Sep 22, 2022 |
| Linux | expat Debian 12.15 (bookworm) | 2.4.8-2 | [DEBIAN-CVE-2022-40674](https://patchblox.com/security/data/fix/linux/debian-cve-2022-40674.md) | Sep 14, 2022 |
| Linux | expat Debian 13.5 (trixie) | 2.4.8-2 | [DEBIAN-CVE-2022-40674](https://patchblox.com/security/data/fix/linux/debian-cve-2022-40674.md) | Sep 14, 2022 |
| Linux | expat Debian 14 | 2.4.8-2 | [DEBIAN-CVE-2022-40674](https://patchblox.com/security/data/fix/linux/debian-cve-2022-40674.md) | Sep 14, 2022 |
| Linux | expat RHEL 8 | 0:2.2.5-8.el8_6.3 | [RHSA-2022:6878](https://patchblox.com/security/data/fix/linux/rhsa-2022-6878.md) | Oct 11, 2022 |
| Linux | expat RHEL 9 | 0:2.2.10-12.el9_0.3 | [RHSA-2022:6838](https://patchblox.com/security/data/fix/linux/rhsa-2022-6838.md) | Oct 6, 2022 |
| Linux | expat Ubuntu 18.04.6 LTS (bionic) | 2.2.5-3ubuntu0.8 | [expat 2.2.5-3ubuntu0.8](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-expat-2.2.5-3ubuntu0.8.md) | Oct 24, 2022 |
| Linux | expat Ubuntu 20.04 LTS (focal) | 2.2.9-1ubuntu0.5 | [expat 2.2.9-1ubuntu0.5](https://patchblox.com/security/data/fix/linux/ubuntu-focal-expat-2.2.9-1ubuntu0.5.md) | Sep 14, 2022 |
| Linux | expat Ubuntu 22.04.1 LTS (jammy) | 2.4.7-1ubuntu0.1 | [expat 2.4.7-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-expat-2.4.7-1ubuntu0.1.md) | Sep 14, 2022 |
| Linux | expat Ubuntu 24.10 (oracular) | 2.5.0-1 | [expat 2.5.0-1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-expat-2.5.0-1.md) | Jan 16, 2026 |
| Linux | expat Ubuntu 25.04 (plucky) | 2.5.0-1 | [expat 2.5.0-1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-expat-2.5.0-1.md) | Jan 16, 2026 |
| Linux | expat almalinux 8 | 2.2.5-8.el8_6.3 | [ALSA-2022:6878](https://patchblox.com/security/data/fix/linux/alsa-2022-6878.md) | Oct 11, 2022 |
| Linux | expat almalinux 9 | 2.2.10-12.el9_0.3 | [ALSA-2022:6838](https://patchblox.com/security/data/fix/linux/alsa-2022-6838.md) | Oct 6, 2022 |
| Linux | expat amzn 2023 | 2.5.0-1.amzn2023.0.2 | [ALAS2023-2023-058](https://patchblox.com/security/data/fix/linux/alas2023-2023-058.md) | Feb 17, 2023 |
| Linux | expat ol 8 | 0:2.2.5-8.0.1.el8_6.3 | [ELSA-2022-6878](https://patchblox.com/security/data/fix/linux/elsa-2022-6878.md) | Oct 11, 2022 |
| Linux | expat ol 9 | 0:2.2.10-12.el9_0.3 | [ELSA-2022-6838](https://patchblox.com/security/data/fix/linux/elsa-2022-6838.md) | Oct 6, 2022 |
| Linux | expat rocky 8 | 0:2.2.5-8.el8_6.3 | [RLSA-2022:6878](https://patchblox.com/security/data/fix/linux/rlsa-2022-6878.md) | Oct 11, 2022 |
| Linux | expat rocky 9 | 0:2.2.10-12.el9_0.3 | [RLSA-2022:6838](https://patchblox.com/security/data/fix/linux/rlsa-2022-6838.md) | Oct 6, 2022 |
| Linux | expat-debuginfo amzn 2023 | 2.5.0-1.amzn2023.0.2 | [ALAS2023-2023-058](https://patchblox.com/security/data/fix/linux/alas2023-2023-058.md) | Feb 17, 2023 |
| Linux | expat-debugsource amzn 2023 | 2.5.0-1.amzn2023.0.2 | [ALAS2023-2023-058](https://patchblox.com/security/data/fix/linux/alas2023-2023-058.md) | Feb 17, 2023 |
| Linux | expat-devel RHEL 8 | 0:2.2.5-8.el8_6.3 | [RHSA-2022:6878](https://patchblox.com/security/data/fix/linux/rhsa-2022-6878.md) | Oct 11, 2022 |
| Linux | expat-devel RHEL 9 | 0:2.2.10-12.el9_0.3 | [RHSA-2022:6838](https://patchblox.com/security/data/fix/linux/rhsa-2022-6838.md) | Oct 6, 2022 |
| Linux | expat-devel almalinux 8 | 2.2.5-8.el8_6.3 | [ALSA-2022:6878](https://patchblox.com/security/data/fix/linux/alsa-2022-6878.md) | Oct 11, 2022 |
| Linux | expat-devel almalinux 9 | 2.2.10-12.el9_0.3 | [ALSA-2022:6838](https://patchblox.com/security/data/fix/linux/alsa-2022-6838.md) | Oct 6, 2022 |
| Linux | expat-devel amzn 2023 | 2.5.0-1.amzn2023.0.2 | [ALAS2023-2023-058](https://patchblox.com/security/data/fix/linux/alas2023-2023-058.md) | Feb 17, 2023 |
| Linux | expat-devel ol 8 | 0:2.2.5-8.0.1.el8_6.3 | [ELSA-2022-6878](https://patchblox.com/security/data/fix/linux/elsa-2022-6878.md) | Oct 11, 2022 |
| Linux | expat-devel ol 9 | 0:2.2.10-12.el9_0.3 | [ELSA-2022-6838](https://patchblox.com/security/data/fix/linux/elsa-2022-6838.md) | Oct 6, 2022 |
| Linux | expat-static amzn 2023 | 2.5.0-1.amzn2023.0.2 | [ALAS2023-2023-058](https://patchblox.com/security/data/fix/linux/alas2023-2023-058.md) | Feb 17, 2023 |
| Linux | firefox RHEL 8 | 0:102.3.0-7.el8_6 | [RHSA-2022:7024](https://patchblox.com/security/data/fix/linux/rhsa-2022-7024.md) | Oct 18, 2022 |
| Linux | firefox RHEL 9 | 0:102.3.0-7.el9_0 | [RHSA-2022:7020](https://patchblox.com/security/data/fix/linux/rhsa-2022-7020.md) | Oct 18, 2022 |
| Linux | firefox Ubuntu 18.04.6 LTS (bionic) | 107.0+build2-0ubuntu0.18.04.1 | [firefox 107.0+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-107.0-build2-0ubuntu0.18.04.1.md) | Nov 15, 2022 |
| Linux | firefox Ubuntu 20.04 LTS (focal) | 107.0+build2-0ubuntu0.20.04.1 | [firefox 107.0+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-107.0-build2-0ubuntu0.20.04.1.md) | Dec 22, 2022 |
| Linux | firefox almalinux 8 | 102.3.0-7.el8_6.alma | [ALSA-2022:7024](https://patchblox.com/security/data/fix/linux/alsa-2022-7024.md) | Oct 18, 2022 |
| Linux | firefox almalinux 9 | 102.3.0-7.el9_0.alma | [ALSA-2022:7020](https://patchblox.com/security/data/fix/linux/alsa-2022-7020.md) | Oct 18, 2022 |
| Linux | firefox ol 8 | 0:102.3.0-7.0.1.el8_6 | [ELSA-2022-7024](https://patchblox.com/security/data/fix/linux/elsa-2022-7024.md) | Oct 20, 2022 |
| Linux | firefox ol 9 | 0:102.3.0-7.0.1.el9_0 | [ELSA-2022-7020](https://patchblox.com/security/data/fix/linux/elsa-2022-7020.md) | Oct 19, 2022 |
| Linux | firefox rocky 8 | 0:102.3.0-7.el8_6 | [RLSA-2022:7024](https://patchblox.com/security/data/fix/linux/rlsa-2022-7024.md) | Oct 18, 2022 |
| Linux | firefox-geckodriver Ubuntu 18.04.6 LTS (bionic) | 107.0+build2-0ubuntu0.18.04.1 | [firefox-geckodriver 107.0+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-geckodriver-107.0-build2-0ubuntu0.18.04.1.md) | Nov 15, 2022 |
| Linux | firefox-geckodriver Ubuntu 20.04 LTS (focal) | 107.0+build2-0ubuntu0.20.04.1 | [firefox-geckodriver 107.0+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-geckodriver-107.0-build2-0ubuntu0.20.04.1.md) | Dec 22, 2022 |
| Linux | firefox-mozsymbols Ubuntu 18.04.6 LTS (bionic) | 107.0+build2-0ubuntu0.18.04.1 | [firefox-mozsymbols 107.0+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-mozsymbols-107.0-build2-0ubuntu0.18.04.1.md) | Nov 15, 2022 |
| Linux | firefox-mozsymbols Ubuntu 20.04 LTS (focal) | 107.0+build2-0ubuntu0.20.04.1 | [firefox-mozsymbols 107.0+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-mozsymbols-107.0-build2-0ubuntu0.20.04.1.md) | Dec 22, 2022 |
| Linux | libexpat1 Ubuntu 18.04.6 LTS (bionic) | 2.2.5-3ubuntu0.8 | [libexpat1 2.2.5-3ubuntu0.8](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libexpat1-2.2.5-3ubuntu0.8.md) | Oct 24, 2022 |
| Linux | libexpat1 Ubuntu 20.04 LTS (focal) | 2.2.9-1ubuntu0.5 | [libexpat1 2.2.9-1ubuntu0.5](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libexpat1-2.2.9-1ubuntu0.5.md) | Sep 14, 2022 |
| Linux | libexpat1 Ubuntu 22.04.1 LTS (jammy) | 2.4.7-1ubuntu0.1 | [libexpat1 2.4.7-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libexpat1-2.4.7-1ubuntu0.1.md) | Sep 14, 2022 |
| Linux | libexpat1 Ubuntu 24.10 (oracular) | 2.5.0-1 | [libexpat1 2.5.0-1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-libexpat1-2.5.0-1.md) | Jan 16, 2026 |
| Linux | libexpat1 Ubuntu 25.04 (plucky) | 2.5.0-1 | [libexpat1 2.5.0-1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-libexpat1-2.5.0-1.md) | Jan 16, 2026 |
| Linux | mingw-expat rocky 8 | 0:2.4.8-2.el8 | [RLSA-2023:3068](https://patchblox.com/security/data/fix/linux/rlsa-2023-3068.md) | Dec 27, 2025 |
| Linux | mingw32-expat RHEL 8 | 0:2.4.8-2.el8 | [RHSA-2023:3068](https://patchblox.com/security/data/fix/linux/rhsa-2023-3068.md) | May 16, 2023 |
| Linux | mingw32-expat almalinux 8 | 2.4.8-2.el8 | [ALSA-2023:3068](https://patchblox.com/security/data/fix/linux/alsa-2023-3068.md) | May 16, 2023 |
| Linux | mingw64-expat RHEL 8 | 0:2.4.8-2.el8 | [RHSA-2023:3068](https://patchblox.com/security/data/fix/linux/rhsa-2023-3068.md) | May 16, 2023 |
| Linux | mingw64-expat almalinux 8 | 2.4.8-2.el8 | [ALSA-2023:3068](https://patchblox.com/security/data/fix/linux/alsa-2023-3068.md) | May 16, 2023 |
| Linux | thunderbird RHEL 8 | 0:102.3.0-4.el8_6 | [RHSA-2022:7023](https://patchblox.com/security/data/fix/linux/rhsa-2022-7023.md) | Oct 18, 2022 |
| Linux | thunderbird RHEL 9 | 0:102.3.0-4.el9_0 | [RHSA-2022:7026](https://patchblox.com/security/data/fix/linux/rhsa-2022-7026.md) | Oct 18, 2022 |
| Linux | thunderbird almalinux 8 | 102.3.0-4.el8_6.alma | [ALSA-2022:7023](https://patchblox.com/security/data/fix/linux/alsa-2022-7023.md) | Oct 18, 2022 |
| Linux | thunderbird almalinux 9 | 102.3.0-4.el9_0.alma.plus | [ALSA-2022:7026](https://patchblox.com/security/data/fix/linux/alsa-2022-7026.md) | Oct 18, 2022 |
| Linux | thunderbird ol 8 | 0:102.3.0-4.0.1.el8_6 | [ELSA-2022-7023](https://patchblox.com/security/data/fix/linux/elsa-2022-7023.md) | Oct 20, 2022 |
| Linux | thunderbird ol 9 | 0:102.3.0-4.0.1.el9_0 | [ELSA-2022-7026](https://patchblox.com/security/data/fix/linux/elsa-2022-7026.md) | Oct 19, 2022 |
| Linux | thunderbird rocky 8 | 0:102.3.0-4.el8_6 | [RLSA-2022:7023](https://patchblox.com/security/data/fix/linux/rlsa-2022-7023.md) | Oct 18, 2022 |

---

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